/*
 * Copyright (c) 2022 Winner Microelectronics Co., Ltd. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "libm.h"

double copysign(double x, double y)
{
    union {
        double f;
        uint64_t i;
    }
    ux = {x}, uy = {y};
    ux.i &= -1ULL/2;
    ux.i |= uy.i & 1ULL<<63;
    return ux.f;
}
